Chemical state analysis of grain boundaries in ZnO varistors by Auger electron spectroscopy
- Hitachi Ltd., Ibaraki (Japan)
- Taiyo Yuden Co., Ltd., Gunma (Japan)
- Tokyo Inst. of Technology (Japan)
- Inst. of Physical and Chemical Research, Saitama (Japan)
- National Inst. for Research in Inorganic Materials, Ibaraki (Japan)
The chemical state of grain boundaries in Bi[sub 2]O[sub 3]-doped ZnO ceramics was investigated by Auger electron spectroscopy. The additive Bi was segregated into grain boundaries 2 to 3 nm thick, where oxygen deficiency occurred. Auger transitions KL[sub 2,3]L[sub 2,3] for oxygen at the grain boundaries were composed of three peaks whose relative intensities varied with the amount of the segregated Bi. Results calculated using a molecular orbital method suggested that the metal-oxygen bonding state in the grain boundary changed with increased amounts of Bi. The change of the bonding character was considered to be related to the formation of an interfacial state at the grain boundary causing nonlinear current-voltage characteristics. 16 refs., 9 figs.
- OSTI ID:
- 5726614
- Journal Information:
- Journal of Solid State Chemistry; (United States), Vol. 105:1; ISSN 0022-4596
- Country of Publication:
- United States
- Language:
- English
Similar Records
Grain-boundary compositions in YBa/sub 2/Cu/sub 3/O/sub 7/. sqrt. /sub x/ from Auger electron spectroscopy of fracture surfaces
Preliminary Results of Activated Sintering Mechanism and Grain Boundary Prewetting/premelting in Nickel-doped Tungsten
Related Subjects
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
BISMUTH OXIDES
GRAIN BOUNDARIES
ZINC OXIDES
AUGER ELECTRON SPECTROSCOPY
CERAMICS
CHEMICAL COMPOSITION
CHEMICAL STATE
CRYSTAL DOPING
ELECTRIC CONDUCTIVITY
MOLECULAR ORBITAL METHOD
BISMUTH COMPOUNDS
CALCULATION METHODS
CHALCOGENIDES
ELECTRICAL PROPERTIES
ELECTRON SPECTROSCOPY
MICROSTRUCTURE
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
SPECTROSCOPY
ZINC COMPOUNDS
360202* - Ceramics
Cermets
& Refractories- Structure & Phase Studies
400201 - Chemical & Physicochemical Properties